Advanced nMEA 0183 Wiring
The GPSMAP 4000/5000 series chartplotter features four ports to receive NMEA 0183 data (RX ports), and two ports to send NMEA 0183 data
(TX ports). Wire one NMEA 0183 device per RX port to send data to a 4000/5000 series chartplotter. Wire up to three NMEA 0183 devices in
parallel to each TX port to receive data from a 4000/5000 series chartplotter.
Each RX and TX port has 2 wires, labeled A (+) and B (-) according to the NMEA 0183 convention. Connect the corresponding A (+) and B (-)
wires of each port to the A (+) and B (-) wires of your NMEA 0183-compliant device. Refer to the table and wiring diagrams when wiring the
4000/5000 chartplotter to NMEA 0183 devices.
Consult the installation instructions of your NMEA 0183-compliant device to identify the Transfer (TX) A(+) and B(-) wires and
Receiving (RX) A(+) and B(-) wires. Use 28 AWG, shielded, twisted-pair wiring for extended runs of wire. Solder all connections and seal
them with heat-shrink tubing.
notes:
• For two-way communication with a NMEA 0183 device, the ports on the GPSMAP 4000/5000 chartplotters are not linked. For example,
if the RX port of the NMEA 0183-compliant device is wired to TX port 1 on the GPSMAP 4000/5000, you can wire the TX port of your
NMEA 0183-compliant device to RX port 1, port 2, port 3, or port 4 on the GPSMAP 4000/5000.
• The ground wires on the NMEA 0183 data cable from the GPSMAP 4000/5000 series chartplotter and your NMEA 0183-compliant device
must both be grounded.
• Approved NMEA 0183 sentences—GPBWC, GPRMC, GPGGA, GPGSA, GPGSV, GPGLL, GPBOD, GPRMB, GPRTE, GPVTG,
GPWPL, GPXTE, and Garmin proprietary sentences —PGRME, PGRMM, and PGRMZ.
• The GPSMAP 4000/5000 series chartplotter also includes support for the WPL sentence, DSC, and sonar NMEA 0183 input with support for
the DPT (depth) or DBT, MTW (water temperature), and VHW (water temperature, speed, and heading) sentences.
• Use the Communications section of the Configure menu on the GPSMAP 4000/5000 series chartplotter to set up NMEA 0183
communications. See the owner's manual for details.
Port
Receiving Port 1
Receiving Port 2
Receiving Port 3
Receiving Port 4
Transmitting
Port 1
Transmitting
Port 2
N/A
N/A
N/A
N/A
N/A
N/A
N/a
16
Wire Function
RX / A (+)
RX / B (-)
Orange/White
RX / A (+)
RX / B (-)
Brown/White
RX / A (+)
RX / B (-)
Violet/White
RX / A (+)
Black/White
rX / B (-)
tX / A (+)
tX / B (-)
tX / A (+)
tX / B (-)
GPS 17 in
Green/White
GPS 17 out
spare
Alarm
Accessory on
Ground
spare
GPSMAP 4000/5000 Series nMEA 0183 Data Cable
Wire Color
Pin number
White
Brown
Violet
10
11
Red/White
12
Gray
Pink
Blue
Blue/White
13
Green
14
15
Yellow
16
Orange
17
Black
18
19
Connector
1
2
5
6
9
PIn 1
3
PIn 8
4
7
PIn 17
8
NMEA 0183 Cable End
View
GPSMAP 4000/5000 Series Installation Instructions
PIn 3
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